function shimit(obj){
if (typeof shim=='undefined')
return;
var shimobj=document.getElementById('shim').style;
shimobj.height=obj.offsetHeight+'px'
shimobj.width=obj.offsetWidth+'px'
var obj=obj.style
shimobj.left=obj.left
shimobj.top=obj.top
shimobj.zIndex=99
shimobj.display='block'
}

function noshim(){
if (typeof shim=='undefined')
return;
document.getElementById('shim').style.display='none';
}